Sargent 68-3580 Inner Chassis Assembly for 80 Series Exit Devices (700-4 ET and Control)

The Sargent 68-3580 is a factory-replacement inner chassis assembly — also referenced as the 700-4 ET and Control chassis — engineered specifically for the Sargent 80 Series exit device line. This is the core operating chassis that resides inside the exit device body: when the push bar (push rail) is depressed, the rail transfers mechanical force to this chassis, which in turn retracts the latch bolt to allow immediate, code-compliant egress. Replacing a worn or failed chassis restores the exit device to factory performance without requiring a full device replacement, making the 68-3580 the preferred part for commercial door hardware service technicians, facility maintenance teams, and institutional door contractors working on Sargent 80 Series panic hardware.

Institutional Grade Features & Benefits

• Core Mechanical Function: Serves as the primary operating chassis of the 80 Series exit device — translating push-bar force into reliable latch retraction for controlled, safe egress.
• Genuine Sargent Replacement Part: Sourced as a Sargent brand chassis assembly, ensuring dimensional accuracy, material quality, and compatibility consistent with the original factory specification.
• Broad 80 Series Compatibility: Confirmed fit across multiple 80 Series models, allowing a single stock item to serve a wide range of exit device configurations on a job site or in a maintenance inventory.
• Cost-Effective Repair Solution: Restores full exit device operation at a fraction of the cost of a complete device replacement — ideal for facilities management programs and service contractors focused on lifecycle cost reduction.
• Precision Drop-In Fit: Designed to the exact internal geometry of supported 80 Series devices, minimizing installation time and reducing the risk of callback due to misfit components.
• Life Safety Compliance Support: Proper chassis function is essential to maintaining NFPA 101 Life Safety Code and IBC egress hardware performance requirements — this part directly supports that compliance on existing 80 Series installations.

Compatible Sargent 80 Series Exit Device Models

The Sargent 68-3580 chassis assembly is confirmed compatible with the following full-designation Sargent 80 Series exit device models:

• 8606
• 8610
• 8613
• 8615
• 8640
• 8643
• 8646
• 8673
• 8674

Always verify the full model designation on the existing device label before ordering to ensure correct chassis selection.

Technical Details

Parts List Illustration